A kind of manufacture method of titanium alloy tie hoop material

A titanium alloy and hoop technology, which is applied in the manufacture of titanium alloy hoop materials and the field of titanium alloy hoop materials, can solve the problems of difficult development and processing technology of titanium alloy hoop materials, difficult processing and forming, and high strength. , to achieve the effect of good appearance quality, reduced heat preservation time and low cost

Active Publication Date: 2016-05-04
TIANJIN PIPE GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium alloy has the characteristics of high temperature resistance, high strength, difficult deformation, and extremely difficult processing and forming, so it is difficult to develop and process titanium alloy hoop materials.

Method used

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  • A kind of manufacture method of titanium alloy tie hoop material
  • A kind of manufacture method of titanium alloy tie hoop material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Smelting: Prepare raw materials according to the following ingredients. The Ti is made of sponge titanium, smelted three times in a vacuum consumable electric arc furnace, and forged to obtain a Ф150mm billet tube;

[0029] The chemical composition is as follows: Ti balance, Al: 6%, Nb: 2.6%, Zr: 2.1%, Mo: 0.9%, Fe: 0.04%, Si: 0.02%.

[0030] (2) Heating: The blank tube enters the ring furnace for heating. The heating system of the ring furnace is 800°C in zone 1, 850°C in zone 2 for 2 hours, 970°C in zone 3, and 970°C in zone 4 for 1.5 hours; the reducing atmosphere is controlled in the furnace , maintain a slight positive pressure.

[0031] (3) Piercing and rolling: control the time for the round billet to reach the piercing machine from the heating furnace to 15-25s to ensure the rolling temperature of the piercing machine, and use a two-roll cross-rolling piercing machine to roll into a capillary tube of Ф163×20.5mm;

[0032] (4) Diameter reduction: Heat the ab...

Embodiment 2

[0035] (1) Smelting: Prepare raw materials according to the following ingredients. The Ti is made of sponge titanium, smelted three times in a vacuum consumable electric arc furnace, and forged to obtain a Ф150mm billet tube;

[0036] The chemical composition is as follows: Ti balance, Al: 7%, Nb: 2%, Zr: 0.7%, Mo: 0.9%, Fe: 0.04%, Si: 0.02%.

[0037] (2) Heating: The billet tube enters the annular furnace for heating. The heating system of the annular heating furnace is 800°C in zone 1, 850°C in zone 2 for 2 hours, 970°C in zone 3, and 970°C in zone 4 for 1.5 hours. Control the reducing atmosphere in the furnace and maintain a slight positive pressure;

[0038] (3) Piercing and rolling: the intermediate time of the round billet leaving the heating furnace and entering the piercing machine is controlled at 15-25s to ensure the rolling temperature of the piercing machine, and a two-roll cross-rolling piercing machine is used to roll into a capillary tube of Ф166×20.5mm;

[003...

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Abstract

The invention provides a manufacturing method of titanium alloy coupling stock. The method comprises the steps of smelting, wherein titanium sponge is smelted for three times in a vacuum arc remelting electric-arc furnace to obtain a round billet with a diameter of 150mm; heating, wherein the round billet is placed into an annular furnace to be heated; punching, wherein the round billet is rolled to be a tubular billet with a punching machine; reducing, wherein the tubular billet is placed into a reheating furnace to be heated again to 970 DEG C, then kept at the temperature for 1h and finally reduced to obtain a finished tube; heat treatment, wherein the punched tubular product is kept at a temperature of 950-960 DEG C for 50-60min and then air-cooled. The manufacturing method of the titanium alloy coupling stock has the advantages that due to the fact that the hot-punched tubular billet is directly reduced to obtain the titanium alloy coupling stock, spiral lines on the punched tubular billet can be completely eliminated through sizing, and good appearance quality of a steel tube is guaranteed; rolling is eliminated, the process is simple, and cost is low; due to the fact that the heating temperature is below the phase transformation point of titanium alloy, the appearance of thick Beta tissue is avoided; due to the fact that the tubular billet is placed into the reheating furnace to be heated again before the reducing, rolling load of a reducing mill is reduced.

Description

technical field [0001] The invention belongs to the field of titanium alloy processing, and relates to a manufacturing method of a titanium alloy hoop material, which is particularly suitable for a titanium alloy hoop material with an outer diameter of 106-109mm and a wall thickness of 20-22mm. Background technique [0002] With the continuous increase of oil well exploitation depth, the site environment is getting worse and worse, and the requirements for the tie material used as the connection oil well pipe are getting higher and higher. Titanium alloy has the characteristics of high temperature resistance, high strength, difficult deformation, and extremely difficult processing and forming, which makes the development and processing technology of titanium alloy hoop material difficult. In order to meet the needs of oilfield exploitation, it has become a top priority to develop a production process for titanium alloy hoop materials with fewer processing steps and a high su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 李强孙开明张旦天李毅孙宇梁海泉董卿王惠斌张传友郝玉华徐志谦张冰肖燕孙徕博刘家泳赵苏娟杨永昌汪尧侯强丁炜
Owner TIANJIN PIPE GROUP CORP
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